Dog trainers are exactly what the term implies:  people who train your dogs.  Dog trainers can be very helpful when you do not have time or the skills to train your dog yourself.  They will take on the task of doing this job for you and offer dog friendly training techniques.  Look for a qualified dog trainer that is a certified member of a dog association.   And, ask if all dogs are required to have been vaccinated before attending.

A skilled trainer will use humane methods to train your dog.  A good dog training facility will allow you to observe one of their classes before you enroll your dog.  You should note if the dogs and people attending are enjoying themselves as this is an indication of how successful the training may be.  A good trainer should encourage all members of the family who interact with the dog to attend (if space permits, of course).  The lessons should also provide ample time for the participants to practice what is learned under the watchful eye of the trainer.  And, the participants should be allowed to ask questions and relay concerns. 

You may also be able to hire a dog trainer on an individual basis.  In this case the dog trainer will come to your home and work with you and your dog on a one-on-one basis.  For some dogs this is a great option, especially if the dog has trouble dealing with, or is aggressive towards, other members of its species.  This individual attention also allows you to learn to cope better with any specific problems or issues your dog may be having.

A dog evaluator may also be a dog trainer.  If you have any concerns that your dog may be a biter, this could be one of the situations where you may require a dog evaluator.  The evaluator will be able to advise you on whether the dog is abnormally vicious or if their biting behavior can be corrected.  (A ‘red’ level rating is usually considered a vicious dog that may be uncontrollable.)

Dog evaluators are also often employed by SPCA agencies to evaluate whether an animal is adoptable.  They will evaluate the dog to see if, for example, a dog will bite when feeding or whether it is ready to put up with children in a family setting.  Some dogs are not adoptable, but some may only need more time to get over any psychological problems they may be experiencing.